Finding the Fourth Proportional to 12,992.40, 19,488.59 and 7,441.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.40 : 19,488.59 = 7,441.89 : x
2. Step 2: Convert to fraction form
   12,992.40/19,488.59 = 7,441.89/x
3. Step 3: Cross multiply
   12,992.40x = 19,488.59 × 7,441.89
4. Step 4: Simplify right side
   12,992.40x = 145,031,905.83
5. Step 5: Solve for x
   x = 145,031,905.83/12,992.40
6. Step 6: Final answer
   x = 11,162.83